Presentazioni e Articoli Tecnici

Two Anode Surface processes are examined : Formation of Solid Electrolyte Interphase (SEI) and heating due to Shuttle Current. During charging, higher order sulfur species are reduced at the anode surface, while they are concurrently being oxidized at the cathode. This leads to the formation of a parasitic ‘shuttle’ current. We show that heating due to this shuttle current can lead to large temperature increases in the battery, which can possibly be controlled by using forced air cooling. The formation of a Solid Electolyte Interphase (SEI) at the anode surface leads to an increase in charge transfer resistance, which causes a reduction in potential. By modeling a time-dependent resistance term, it is possible to qualitatively match experimental results of long life cycling.